View source for Euphorbia trachysperma

{{Treatment/ID
|accepted_name=Euphorbia trachysperma
|accepted_authority=Engelmann in W. H. Emory
|publications={{Treatment/Publication
|title=Rep. U.S. Mex. Bound.
|place=2(1): 189. 1859
|year=1859
}}
|common_names=San Pedro River sandmat
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Chamaesyce trachysperma
|authority=(Engelmann) Millspaugh
}}
|hierarchy=Euphorbiaceae;Euphorbia;Euphorbia sect. Anisophyllum;Euphorbia trachysperma
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Euphorbiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Euphorbia]]</div><div class="higher-taxon"><small>section</small>[[Euphorbia sect. Anisophyllum]]</div><div class="higher-taxon"><small>species</small>[[Euphorbia trachysperma]]</div></div>
|volume=Volume 12
|mention_page=page 256
|treatment_page=page 291
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, with slender taproot. <b>Stems</b> erect to ascending, 10–55 cm, glabrous. <b>Leaves</b> opposite; stipules distinct, narrowly triangular and often divided into 3–5 subulate to filiform segments, 0.8–1.9 mm, glabrous; petiole 1.2–3.1 mm, glabrous; blade oblong, elliptic, or ovate, 12–43 × 3–14 mm, base subsymmetric to asymmetric, rounded, attenuate, or with one side hemicordate and other side rounded, margins usually serrulate, rarely entire on some leaves or portion of blade, apex obtuse to acute, surfaces often with red blotch in center, glabrous; pinnately veined, often only midvein conspicuous. <b>Cyathia</b> solitary at distal nodes; peduncle 1.4–2.4 mm. <b>Involucre</b> oblong, campanulate, or funnel-shaped, 1.5–2.6 × 1.1–2.3 mm, glabrous; glands 4, green to yellowish or tinged with red, subcircular to oblong, 0.4–0.7 × 0.5–1 mm; appendages absent or white, often forming narrow rim or oblong to ovate, 0–0.8 × 1.2 mm, distal margin entire. <b>Staminate</b> flowers 50–60. <b>Pistillate</b> flowers: ovary glabrous; styles 0.5–0.6 mm, 2-fid 1/2 length. <b>Capsules</b> oblate, 2.4–3.2 × 3–3.5 mm, glabrous; columella 2.3–2.5 mm. <b>Seeds</b> light brown, ovoid, 4-angled in cross section, abaxial keel well developed, 1.9–2.3 × 1.3–1.4 mm, finely dimpled and papillate.</span><!--

-->{{Treatment/Body
|phenology=Flowering and fruiting late summer–early winter.
|habitat=Desert scrub, desert grasslands, mesquite woodlands.
|elevation=200–1200 m.
|distribution=Ariz.;Mexico (Baja California Sur;Sonora).
|discussion=<p><i>Euphorbia trachysperma</i> may be expected in extreme southwestern New Mexico given the close proximity of some collections in southeastern Arizona.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Euphorbia trachysperma
|author=
|authority=Engelmann in W. H. Emory
|rank=species
|parent rank=section
|synonyms=Chamaesyce trachysperma
|basionyms=
|family=Euphorbiaceae
|phenology=Flowering and fruiting late summer–early winter.
|habitat=Desert scrub, desert grasslands, mesquite woodlands.
|elevation=200–1200 m.
|distribution=Ariz.;Mexico (Baja California Sur;Sonora).
|reference=None
|publication title=Rep. U.S. Mex. Bound.
|publication year=1859
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V12/V12_85.xml
|genus=Euphorbia
|section=Euphorbia sect. Anisophyllum
|species=Euphorbia trachysperma
}}<!--

-->[[Category:Treatment]][[Category:Euphorbia sect. Anisophyllum]]